Has anyone used one of these kits from TRS? I want to do an HID conversion, but I want to use a projector and not just a set of bulbs. These kits look like they'd be the easiest to install. It appears that theres no modification of the headlight required ( short of opening it up and putting it back together). I'm sure the output isn't as great as a full on retro, but as long as it's good I'd rather go the easier route.

Also in the link it says that there's a d2s version coming for h4 setups. What's the benefit of this, and is it a better way to go? I won't be doing this for awhile, so it'll probably be out by the time I'm ready.

D2S is an actual HID bulb. Your output will be better vs. the H1 I think the mini uses. Talk to Matt at TRS. He is really helpful. I am pretty sure the D2s minis are already out, just shoot him an email and ask. He sent me comparisons of this mini and they were very nice.